Nyal Williams wrote:

Perhaps we need a two-point attachment for each of
the shoulder straps -- the one above the shoulders
that already is in place and which keeps the body from
being thrown forward, plus a second one from be bottom
of the seat pan, and which would prevent the body from
moving upward and aft. This second strap could also
protect against cranial collision with the canopy.

Just be wary of where the shoulder straps attach in the glider. If they
are anchored below shoulder height there's no problem.
ASW-19/Pegase/ASW-20 and Libelle are OK from this respect, as are Juniors.

Some gliders need careful checking because the exact seat arrangement
matters: Some of the early Discii, those fitted with a padded ply seat
back pivoted on a horizontal rod about half way up, have the strap
anchors set too high and you can float up slightly no matter how tight
the straps are. I think the straps run over the top of the seat back
which stops them pulling down on your shoulders quite hard enough.
However, the later models with a shaped glass fibre seat back that
pivots at the bottom don't show this problem.


--
martin@ | Martin Gregorie
gregorie. | Essex, UK
org |